TWI717264B - Optical imaging lens, imaging device, and electronic device - Google Patents

Abstract

An optical imaging lens including, in order from an object side to an image side, a first negative lens having an image-side surface being concave, a second negative lens having an object-side surface being concave, a third positive lens having an object-side surface being convex and an image-side surface being convex, a fourth negative lens having an object-side surface being convex and an image-side surface being concave, a fifth positive lens having an object-side surface being convex and an image-side surface being convex, and a sixth negative lens. The optical imaging lens includes a total of six lens elements. When specific conditions are satisfied, the imaging lens can have a compact size, wide angle of view, and good imaging qualities.

Description

Optical image capturing lens group, imaging device and electronic device

The present invention relates to an optical image capturing lens group and an imaging device, in particular to an optical image capturing lens group, an imaging device and an electronic device suitable for an automotive photographic electronic device or a surveillance camera system.

With the advancement of semiconductor process technology, the pixels of the image sensor device can reach a smaller size, thereby improving the performance of the overall image sensor device. Therefore, the imaging quality of optical imaging lenses must also be continuously improved to meet the needs of the current consumer market.

In addition to the gradual development towards miniaturization, optical lens modules also require a wider camera field of view and good imaging quality. However, increasing the imaging angle of view of the optical lens module often leads to an increase in the total length of the lens group (larger volume), or makes it difficult to correct aberrations. Take US Patent No. 7,623,305 as an example, which includes a first lens group with negative refractive power, an aperture, and a second lens group with positive refractive power; the first lens group includes a first lens with negative refractive power and a positive refractive power The second lens; the second lens group includes a third lens with positive refractive power, a fourth lens with negative refractive power and a fifth lens with positive refractive power. Although the optical lens assembly structure disclosed in this patent can effectively reduce the distortion aberration of the lens imaging, its shooting angle of view can only reach about 70 degrees, which cannot meet the needs of today's consumers.

Therefore, how to provide a small optical lens with a wide viewing angle and good imaging quality has become a problem that people in this technical field urgently want to solve.

Therefore, in order to solve the above-mentioned problems, the present invention provides an optical image capturing lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side. lens. Among them, the first lens has negative refractive power and its image side is concave; the second lens has negative refractive power and its object side is concave; and the third lens has positive refractive power, and its object side is convex and the image side is concave. Convex; the fourth lens has negative refractive power, the object side is convex, and the image side is concave; the fifth lens has positive refractive power, the object side is convex, and the image side is convex; the fourth lens and the fifth lens form A cemented lens; and a sixth lens with negative refractive power and a concave image side surface; the optical image capturing lens group further includes an aperture, which is arranged between the second lens and the fourth lens; the optical image capturing lens The total number of lenses in the group is six; the effective focal length of the optical image capturing lens group is EFL, and the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis is TTL, and the distance between the two is Meet the following relationship: 0.17<EFL/TTL<0.35.

According to an embodiment of the present invention, the focal length of the first lens is f1 and the focal length of the second lens is f2, which satisfies the following relationship: 0.25<f1/f2<0.95.

According to an embodiment of the present invention, the focal length of the third lens is f3, and the effective focal length of the optical image capturing lens group is EFL, which satisfies the following relationship: 0.8<f3/EFL<2.4.

The present invention also provides an optical image capturing lens group, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence from the object side to the image side; wherein, the first lens , With negative refractive power, its image side is concave; the second lens, with negative refractive power, its object side is concave; the third lens, with positive refractive power, its object side is convex, the image side is convex; fourth The lens has negative refractive power, the object side is convex and the image side is concave; the fifth lens has positive refractive power, the object side is convex and the image side is convex; and the sixth lens has negative refractive power; among them, The optical image capturing lens group further includes an aperture, and the aperture is disposed between the second lens and the fourth lens. The total number of lenses in the optical image capturing lens group is six. The focal length of the third lens is f3, and the effective focal length of the optical image capturing lens group is EFL, which satisfies the following relationship: 0.8<f3/EFL<2.4.

Further, according to an embodiment of the present invention, the fourth lens and the fifth lens form a cemented lens.

Further, according to an embodiment of the present invention, the effective focal length of the optical image capturing lens group is EFL, and the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis is TTL, The system satisfies the following relationship: 0.17<EFL/TTL<0.35.

Further, according to an embodiment of the present invention, the focal length of the first lens is f1 and the focal length of the second lens is f2, which satisfies the following relationship: 0.25<f1/f2<0.95.

According to an embodiment of the present invention, the refractive index of the fourth lens is Nd4, the refractive index of the fifth lens is Nd5, the dispersion coefficient of the fourth lens is Vd4, and the dispersion coefficient of the fifth lens is Vd5, which satisfy the following relationship: Nd4>Nd5; and Vd4<Vd5.

According to an embodiment of the present invention, the combined focal length of the fourth lens and the fifth lens is f45, and the focal length f3 of the third lens satisfies the following relationship: 0.4<f3/f45<1.7.

According to an embodiment of the present invention, the curvature radius of the object side surface of the first lens is R1, and the relationship between it and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship: -0.1<EFL/R1<0.4.

According to an embodiment of the present invention, the focal length f1 of the first lens and the effective focal length EFL of the optical image capturing lens group satisfy the following relationship: -2.5<f1/EFL<-0.9.

According to an embodiment of the present invention, the focal length of the fifth lens is f5, and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship: 0.6<f5/EFL<1.1.

According to an embodiment of the present invention, the distance from the image side of the fifth lens to the object side of the sixth lens on the optical axis is AT56, and the distance from the object side of the first lens to the image side of the sixth lens on the optical axis is Dr1r12, the system satisfies the following relationship: 0.09<AT56/Dr1r12<0.3.

According to an embodiment of the present invention, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the refractive index of the first lens is Nd1, The refractive index of the two lenses is Nd2, the refractive index of the third lens is Nd3, the refractive index of the fourth lens is Nd4, the refractive index of the fifth lens is Nd5, and the refractive index of the sixth lens is Nd6, which satisfies the following relationship:

According to an embodiment of the present invention, the distance from the image side of the first lens to the object side of the second lens on the optical axis is AT12, and the thickness of the third lens on the optical axis is CT3, which satisfies the following relationship: 0.3< AT12/CT3<2.4.

According to an embodiment of the present invention, the combined focal length of the second lens and the third lens is f23, the combined focal length of the third lens and the fourth lens is f34, and the combined focal length of the fourth lens and the fifth lens is f45, which satisfies the following Relations: f23>0; f34>0; and f45>0.

The present invention also provides an imaging device, which includes the aforementioned optical image capturing lens group and an image sensing element, wherein the image sensing element is disposed on the imaging surface of the optical image capturing lens group.

The present invention further provides an electronic device, which includes the aforementioned imaging device and a near-infrared emitting element, wherein the near-infrared emitting element is used to emit a near-infrared beam, so that the electronic device can capture in two wavelength regions of visible light or near-infrared image.

10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150: optical image capturing lens group

11, 21, 31, 41, 51, 61, 71, 81, 91, 101, 111, 121, 131, 141, 151: first lens

12, 22, 32, 42, 52, 62, 72, 82, 92, 102, 112, 122, 132, 142, 152: second lens

13, 23, 33, 43, 53, 63, 73, 83, 93, 103, 113, 123, 133, 143, 153: third lens

14, 24, 34, 44, 54, 64, 74, 84, 94, 104, 114, 124, 134, 144, 154: fourth lens

15, 25, 35, 45, 55, 65, 75, 85, 95, 105, 115, 125, 135, 145, 155: fifth lens

16, 26, 36, 46, 56, 66, 76, 86, 96, 106, 116, 126, 136, 146, 156: sixth lens

17, 27, 37, 47, 57, 67, 77, 87, 97, 107, 117, 127, 137, 147, 157: filter element

18, 28, 38, 48, 58, 68, 78, 88, 98, 108, 118, 128, 138, 148, 158: protective glass

19, 29, 39, 49, 59, 69, 79, 89, 99, 109, 119, 129, 139, 149, 159: imaging surface

11a, 21a, 31a, 41a, 51a, 61a, 71a, 81a, 91a, 101a, 111a, 121a, 131a, 141a, 151a: the object side of the first lens

11b, 21b, 31b, 41b, 51b, 61b, 71b, 81b, 91b, 101b, 111b, 121b, 131b, 141b, 151b: the image side of the first lens

12a, 22a, 32a, 42a, 52a, 62a, 72a, 82a, 92a, 102a, 112a, 122a, 132a, 142a, 152a: the object side of the second lens

12b, 22b, 32b, 42b, 52b, 62b, 72b, 82b, 92b, 102b, 112b, 122b, 132b, 142b, 152b: the image side of the second lens

13a, 23a, 33a, 43a, 53a, 63a, 73a, 83a, 93a, 103a, 113a, 123a, 133a, 143a, 153a: the object side of the third lens

13b, 23b, 33b, 43b, 53b, 63b, 73b, 83b, 93a, 103a, 113a, 123a, 133a, 143a, 153a: the image side of the third lens

14a, 24a, 34a, 44a, 54a, 64a, 74a, 84a, 94a, 104a, 114a, 124a, 134a, 144a, 154a: the object side of the fourth lens

14b, 24b, 34b, 44b, 54b, 64b, 74b, 84b, 94b, 104b, 114b, 124b, 134b, 144b, 154b: the image side of the fourth lens

15a, 25a, 35a, 45a, 55a, 65a, 75a, 85a, 95a, 105a, 115a, 125a, 135a, 145a, 155a: the object side of the fifth lens

15b, 25b, 35b, 45b, 55b, 65b, 75b, 85b, 95b, 105b, 115b, 125b, 135b, 145b, 155b: the image side of the fifth lens

16a, 26a, 36a, 46a, 56a, 66a, 76a, 86a, 96a, 106a, 116a, 126a, 136a, 146a, 156a: the object side of the sixth lens

16b, 26b, 36b, 46b, 56b, 66b, 76b, 86b, 96b, 106b, 116b, 126b, 136b, 146b, 156b: the image side of the sixth lens

17a, 17b, 27a, 27b, 37a, 37b, 47a, 47b, 57a, 57b, 67a, 67b, 77a, 77b, 87a, 87b, 97a, 97b, 107a, 107b, 117a, 117b, 127a, 127b, 137a, 137b, 147a, 147b, 157a, 157b: the second surface of the filter element

18a, 18b, 28a, 28b, 38a, 38b, 48a, 48b, 58a, 58b, 68a, 68b, 78a, 78b, 88a, 88b, 98a, 98b, 108a, 108b, 118a, 118b, 128a, 128b, 138a, 138b, 148a, 148b, 158a, 158b: two surfaces of protective glass

10a, 20a, 30a, 40a, 50a, 60a, 70a, 80a, 90a, 100a, 110a, 120a, 130a, 140a, 150a: image sensor

1000: Electronic device

1010: imaging device

1020: Near infrared emitting element

I: Optical axis

[Fig. 1A] is a schematic diagram of the optical image capturing lens group of the first embodiment of the present invention; [Fig. 1B] is the longitudinal spherical aberration diagram, astigmatic field curvature aberration diagram and Distortion aberration diagram; [Figure 2A] is a schematic diagram of the optical image capturing lens group of the second embodiment of the present invention; [Figure 2B] is the longitudinal spherical aberration diagram and astigmatic field of the second embodiment of the present invention in order from left to right Curve aberration diagram and distortion diagram; [FIG. 3A] is a schematic diagram of the optical image capturing lens group of the third embodiment of the present invention; [FIG. 3B] is the longitudinal ball of the third embodiment of the present invention in order from left to right Aberration diagram, astigmatic field curvature aberration diagram, and distortion aberration diagram; [FIG. 4A] is a schematic diagram of the optical image capturing lens group of the fourth embodiment of the present invention; [FIG. 4B] is the fourth embodiment of the present invention in order from left to right The longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the embodiment; [FIG. 5A] is a schematic diagram of the optical image capturing lens group of the fifth embodiment of the present invention; [FIG. 5B] Sequentially from left to right It is the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the distortion aberration diagram of the fifth embodiment of the present invention; [FIG. 6A] is a schematic diagram of the optical image capturing lens group of the sixth embodiment of the present invention; [FIG. 6B] From left to right are the longitudinal spherical aberration map, the astigmatic field curvature aberration map, and the distortion aberration map of the sixth embodiment of the invention in order; [FIG. 7A] is the optical image capture of the seventh embodiment of the invention Take a schematic diagram of the lens group; [FIG. 7B] From left to right are longitudinal spherical aberration diagrams, astigmatic field curvature aberration diagrams, and distortion aberration diagrams of the seventh embodiment of the present invention; [FIG. 8A] is the eighth embodiment of the present invention Example of the schematic diagram of the optical image capturing lens group; [Fig. 8B] From left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the distortion aberration diagram of the eighth embodiment of the present invention; [Fig. 9A] is The schematic diagram of the optical image capturing lens group of the ninth embodiment of the present invention; [FIG. 9B] From left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the distortion aberration diagram of the ninth embodiment of the present invention in sequence; [FIG. 10A] is a schematic diagram of the optical image capturing lens group of the tenth embodiment of the present invention; [FIG. 10B] is the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the diagram from left to right of the tenth embodiment of the present invention in order Distortion aberration diagram; [FIG. 11A] is a schematic diagram of the optical image capturing lens group of the eleventh embodiment of the present invention; [FIG. 11B] is the longitudinal spherical aberration diagram of the eleventh embodiment of the present invention in order from left to right, Astigmatic field curvature aberration diagram and distortion aberration diagram; [FIG. 12A] is a schematic diagram of the optical image capturing lens group of the twelfth embodiment of the present invention; [FIG. 12B] is the twelfth embodiment of the present invention in order from left to right Examples of longitudinal spherical aberration diagrams, astigmatic field curvature aberration diagrams, and distortion aberration diagrams; [Figure 13A] is a schematic diagram of the optical image capturing lens group of the thirteenth embodiment of the present invention; [Figure 13B] Sequentially from left to right Is the longitudinal spherical aberration map, the astigmatic field curvature aberration map, and the distortion aberration map of the thirteenth embodiment of the present invention; [FIG. 14A] is a schematic diagram of the optical image capturing lens group of the fourteenth embodiment of the present invention; [FIG. 14B] is the longitudinal spherical aberration diagram and the astigmatic field curvature aberration of the fourteenth embodiment of the present invention in order from left to right Figure and distortion aberration diagram; [Figure 15A] is a schematic diagram of the optical image capturing lens group of the fifteenth embodiment of the present invention; [Figure 15B] is the longitudinal spherical aberration of the fifteenth embodiment of the present invention in order from left to right Figure, astigmatic field curvature aberration diagram and distortion aberration diagram; [Figure 16] is a schematic diagram of the electronic device of the seventeenth embodiment of the present invention.

In the following embodiments, the lenses of the optical image capturing lens group can be made of glass or plastic materials, and are not limited to the materials listed in the embodiments. When the lens material is glass, the lens surface can be processed by grinding or molding; in addition, due to the temperature change and high hardness of the glass material itself, the impact of environmental changes on the optical image capture lens group can be reduced, thereby extending The service life of the optical image capturing lens group. When the lens material is plastic, it is beneficial to reduce the weight of the optical image capturing lens group and reduce the production cost.

In the embodiment of the present invention, each lens includes an object side facing the object and an image side facing the imaging surface. The surface shape of each lens is defined according to the shape of the area near the optical axis (paraxial) of the surface. For example, when the object side of a lens is described as convex, it means that the object side of the lens near the optical axis is convex. That is, although the lens surface is described as a convex surface in the embodiment, the surface may be convex or concave in the region away from the optical axis (off-axis). The shape at the paraxial position of each lens is judged by the positive or negative curvature radius of the surface. For example, if the curvature radius of the object side surface of a lens is positive, the object side surface is convex; otherwise, if it is If the radius of curvature is negative, the side surface of the object is concave. As for the image side surface of a lens, if its radius of curvature is positive, the image side surface is concave; on the contrary, if its radius of curvature is negative, the image side surface is convex.

In the embodiment of the present invention, the object side surface and the image side surface of each lens may be spherical or aspherical surfaces. The use of an aspheric surface on the lens helps correct the imaging aberrations of the optical image capturing lens group such as spherical aberration, and reduces the number of optical lens elements used. However, the use of an aspheric lens increases the cost of the overall optical image capturing lens assembly. Although in the embodiments of the present invention, the surface of some optical lenses uses a spherical surface, it can still be designed as an aspheric surface if necessary.

In the embodiment of the present invention, the total track length (TTL) of the optical image capturing lens group is defined as the distance on the optical axis from the object side of the first lens of the optical image capturing lens group to the imaging surface. The imaging height of the optical image capturing lens group is called the maximum image height ImgH (Image Height); when an image sensor is installed on the imaging surface, the maximum image height ImgH represents the diagonal of the effective sensing area of the image sensor Half the length. In the following embodiments, the units of curvature radius, lens thickness, distance between lenses, total lens group length TTL, maximum image height ImgH and focal length (Focal Length) are all expressed in millimeters (mm).

The invention provides an optical image capturing lens group, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from the object side to the image side. Among them, the first lens has negative refractive power and its image side surface is concave; the second lens has negative refractive power and its object side surface is concave; the third lens has positive refractive power, its object side surface is convex and the image side surface is convex; The four lenses have negative refractive power, the object side is convex, and the image side is concave; the fifth lens has positive refractive power, the object side is convex, and the image side is convex; the sixth lens has negative refractive power; this optical image capture The lens group further includes an aperture, which is arranged between the second lens and the third lens, or between the third lens and the fourth lens; wherein the total number of lenses in the optical image capturing lens group is six.

The first lens has a negative refractive power, and its image side surface is concave, which helps when incident rays of different angles pass through the first lens, a light beam closer to the optical axis can be formed through the image side surface to improve the optical image capturing lens assembly The light receiving range.

The second lens also has negative refractive power, and its object side surface is concave. Setting a second lens with negative refractive power after the first lens helps to disperse the negative refractive power of the front end of the lens group in the first lens and the second lens, and further adjust the direction of light travel through the second lens. Conducive to reducing aberrations.

The third lens has a positive refractive power, the object side surface is convex, and the image side surface is convex. The third lens is used as an element for adjusting the optical path to converge the divergent light beams formed by the first lens and the second lens.

The fourth lens has negative refractive power, the object side is convex, and the image side is concave; the fifth lens has positive refractive power, the object side is convex, and the image side is convex; the fourth lens and the fifth lens are respectively It has positive and negative refractive power, and the use of the fourth lens as a concave lens and the fifth lens as a convex lens is beneficial to eliminate field curvature, spherical aberration and chromatic aberration.

Further, the fourth lens and the fifth lens of the optical image capturing lens group are bonded to form a cemented lens, which helps correct spherical aberration and chromatic aberration.

The sixth lens has a negative refractive power. Preferably, the image side surface is concave, which helps correct curvature of field aberrations and distortion aberrations.

The effective focal length of the optical image capturing lens group is EFL, and the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis is TTL, which satisfies the following relationship: 0.17<EFL/TTL <0.35; (1) By satisfying the relational formula (1), it is beneficial to increase the imaging angle of the lens group and maintain the miniaturization of the lens group; when the EFL/TTL is lower than the lower limit of the relational formula (1), the optical image capturing lens group is likely The total length of is too long; when EFL/TTL is higher than the upper limit of relation (1), the total length of the optical image capturing lens group is too short, which is not conducive to correcting imaging aberrations.

The focal length of the first lens of the optical image capturing lens group is f1, and the focal length of the second lens is f2, which satisfies the following relationship: 0.25<f1/f2<0.95; (2) By satisfying the relationship (2), the negative refractive power of the first lens and the second lens can be appropriately distributed, which is beneficial to increase the light receiving range of the lens group and expand the field of view; when f1/f2 is lower than the relationship (2 The lower limit of ), the refractive power of the first lens is too large, which causes the curvature radius of the image side of the first lens to be too small, which is not conducive to processing; when f1/f2 is higher than the upper limit of relation (2), it is easy to cause the imaging angle to shrink , And the total length of the lens group is shortened, and the image height becomes smaller.

The focal length of the third lens of the optical image capturing lens group is f3, and the effective focal length EFL of the overall optical image capturing lens group satisfies the following relationship: 0.8<f3/EFL<2.4; (3) By satisfying the relational formula (3), it is advantageous to reduce the volume of the optical image capturing lens group while maintaining good optical performance. If f3/EFL is lower than the lower limit of the relationship (3), the positive refractive power of the third lens is too large, which easily causes the combined focal length of the first lens, the second lens and the third lens to shorten, which is not conducive to correcting aberrations ; If f3/EFL is higher than the upper limit of the relationship (3), the effective focal length EFL of the overall optical image capturing lens group is too short, which easily causes the image height on the imaging surface to shrink.

The refractive index of the fourth lens of the optical image capturing lens group is Nd4, the refractive index of the fifth lens is Nd5; the dispersion coefficient of the fourth lens is Vd4, and the dispersion coefficient of the fifth lens is Vd5; the following relationship is satisfied : Nd4>Nd5; and (4) Vd4<Vd5; (5) By satisfying the relational expressions (4) and (5), it is helpful to correct the chromatic aberration of the optical image capturing lens group.

The combined focal length of the fourth lens and the fifth lens of the optical image capturing lens group is f45, and the focal length f3 of the third lens satisfies the following relationship: 0.4<f3/f45<1.7; (6) By satisfying the relationship (6), the focal length of the third lens and the combined focal length of the fourth lens and the fifth lens can be controlled to maintain an appropriate ratio, so that the third lens, the fourth lens and the fifth lens have similar Lens size, and help to adjust the direction of light travel, thereby reducing imaging aberrations.

The curvature radius of the object side surface of the first lens of the optical image capturing lens group is R1, and the effective focal length EFL of the overall optical image capturing lens group satisfies the following relationship: -0.1<EFL/R1<0.4 ; (7) By satisfying the relational formula (7), it is beneficial to increase the light collection range of the optical image capturing lens group and expand the imaging angle of view.

The focal length f1 of the first lens of the optical image capturing lens group and the effective focal length EFL of the optical image capturing lens group satisfy the following relationship: -2.5<f1/EFL<-0.9; (8) By satisfying the relationship (8), the refractive power of the first lens can be controlled to be maintained at an appropriate level; when f1/EFL is lower than the lower limit of the relationship (8), the focal length of the first lens is too long, making the first lens The increase in the effective optical radius of a lens is not conducive to the miniaturization of the lens group; when f1/EFL is higher than the upper limit of the relationship (8), it is easy to shorten the distance between the first lens and the second lens on the optical axis. Or, the effective focal length of the optical image capturing lens group is lengthened, and the effective optical radius of the sixth lens is increased, which is also not conducive to the miniaturization of the lens group.

The focal length of the fifth lens of the optical image capturing lens group is f5, and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship: 0.6<f5/EFL<1.1; (9) By satisfying the relational formula (9), the focal length of the fifth lens can be controlled to maintain an appropriate size; when f5/EFL is lower than the lower limit of the relational formula (9), it is easy to make the imaging angle of the lens group smaller and the lens group When f5/EFL is higher than the upper limit of the relationship (9), it is easy to cause the combined focal length of the fourth lens and the fifth lens to be too long, which is not conducive to correcting imaging aberrations.

The distance from the fifth lens image side to the sixth lens object side of the optical image capturing lens group on the optical axis is AT56, and the distance from the first lens object side to the sixth lens image side on the optical axis is Dr1r12, The system satisfies the following relationship: 0.09<AT56/Dr1r12<0.3; (10) By satisfying the relationship (10), the distance between the fifth lens and the sixth lens on the optical axis can be controlled, which is beneficial to maintaining the miniaturization of the lens group.

藉由滿足關係式(11)，有利於降低光學影像擷取透鏡組之場曲像差，提高成像品質。 The focal length of the first lens of the optical image capturing lens group is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, The focal length of the six lens is f6, the refractive index of the first lens is Nd1, the refractive index of the second lens is Nd2, the refractive index of the third lens is Nd3, the refractive index of the fourth lens is Nd4, and the refractive index of the fifth lens It is Nd5, and the refractive index of the sixth lens is Nd6. This optical image capturing lens group satisfies the following relationship:

By satisfying the relational formula (11), it is beneficial to reduce the field curvature aberration of the optical image capturing lens group and improve the imaging quality.

The distance from the image side surface of the first lens of the optical image capturing lens group to the object side surface of the second lens on the optical axis is AT12, and the thickness of the third lens on the optical axis is CT3, which satisfies the following relationship : 0.3<AT12/CT3<2.4; (12) By satisfying the relationship (12), it can be used to adjust the distance between the first lens and the second lens on the optical axis and the thickness of the third lens on the optical axis, maintaining an appropriate ratio between the two, which is conducive to forming a wide viewing angle Structure, expand the angle of view.

The combined focal length of the second lens and the third lens of the optical image capturing lens group is f23, the combined focal length of the third lens and the fourth lens is f34, and the combined focal length of the fourth lens and the fifth lens is f45. The image capturing lens group satisfies the following relationship: f23>0; f34>0; and f45>0; (13) By satisfying the relational formula (13), it is beneficial to correct the traveling direction of the light, so that the incident light is transmitted closer to the optical axis, which helps to reduce the imaging aberration.

First embodiment

1A and 1B, FIG. 1A is a schematic diagram of the optical image capturing lens assembly according to the first embodiment of the present invention. Fig. 1B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the first embodiment of the present invention in order from left to right.

As shown in FIG. 1A, the optical image capturing lens group 10 of the first embodiment includes a first lens 11, a second lens 12, an aperture ST, a third lens 13, a fourth lens 14, and The fifth lens 15 and the sixth lens 16. The optical image capturing lens assembly 10 can further include a filter element 17, a protective glass 18 and an imaging surface 19. An image sensing element 10a can be further provided on the imaging surface 19 to form an imaging device (not marked separately).

The first lens 11 has a negative refractive power, the object side surface 11a is concave, the image side surface 11b is concave, and both the object side surface 11a and the image side surface 11b are spherical surfaces. The first lens 11 is made of glass material.

The second lens 12 has a negative refractive power, the object side surface 12a is concave, the image side surface 12b is convex, and both the object side surface 12a and the image side surface 12b are aspherical. The second lens 12 is made of plastic material.

The third lens 13 has a positive refractive power, the object side surface 13a is convex, the image side surface 13b is convex, and both the object side surface 13a and the image side surface 13b are aspherical. In more detail, the image side surface 13b of the third lens 13 is a convex surface near the axis and a concave surface off the axis, and the image side surface 13b has two inflection points. The third lens 13 is made of plastic material.

The fourth lens 14 has a negative refractive power, the object side 14a is convex, the image side 14b is concave, and both the object side 14a and the image side 14b are spherical. The fourth lens 14 is made of glass material.

The fifth lens 15 has a positive refractive power, the object side 15a is convex, the image side 15b is convex, and both the object side 15a and the image side 15b are spherical. The fifth lens 15 is made of glass material. The image side surface 14b of the fourth lens 14 and the object side surface 15a of the fifth lens 15 are bonded to each other to form a cemented lens.

The sixth lens element 16 has a negative refractive power, the object side surface 16a is convex, the image side surface 16b is concave, and the object side surface 16a and the image side surface 16b of the sixth lens element are aspherical. In more detail, the object side 16a of the sixth lens 16 is convex at the paraxial position and concave at the off-axis position, the image side 16b is concave at the paraxial position and convex at the off-axis position, and the object side 16a of the sixth lens 16 And the image side 16b has two inflection points respectively. The sixth lens 16 is made of plastic material.

The filter element 17 is disposed between the sixth lens 16 and the imaging surface 19 to filter out light in a specific wavelength range. Both surfaces 17a and 17b of the filter element 17 are flat surfaces, and the material is glass.

The protective glass 18 is disposed on the image sensing element 10a, and its two surfaces 18a, 18b are both flat surfaces, and its material is glass.

The image sensor 10a is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The curve equation of each aspheric surface mentioned above is expressed as follows:

Among them, X: the distance between the point Y on the aspheric surface from the optical axis and the tangent surface of the aspheric surface on the optical axis; Y: the vertical distance between the point on the aspheric surface and the optical axis; R: the lens at the near optical axis The radius of curvature of; K: conical surface coefficient; and Ai: the i-th aspheric surface coefficient.

Please refer to Table 1 below, which is the detailed optical data of the optical image capturing lens assembly 10 of the first embodiment of the present invention. Wherein, the object side surface 11a of the first lens 11 is designated as the surface 11a, the image side surface 11b is designated as the surface 11b, and the other lens surfaces are deduced by analogy. The value in the distance column in the table represents the distance from the surface to the next surface on the optical axis I. For example, the distance from the object side 11a to the image side 11b of the first lens 11 is 0.7mm, which means that the thickness of the first lens 11 is 0.7 mm. The distance from the image side surface 11b of the first lens 11 to the object side surface 12a of the second lens 12 is 2.332 mm. Others can be deduced by analogy, and will not be repeated below. In the first embodiment, the effective focal length of the optical image capturing lens group 10 is EFL, the aperture value (F-number) is Fno, and half of the maximum viewing angle of the overall optical image capturing lens group 10 is HFOV (Half Field of View). The values are also listed in Table 1.

Please refer to Table 2 below, which shows the aspheric coefficients of each surface of the second lens, the third lens and the sixth lens in the first embodiment of the present invention. Among them, K is the conical coefficient in the aspheric curve equation, and A ₄ to A ₁₆ represent the 4th to 16th order aspheric coefficients of each surface. For example, the conical coefficient K of the object side surface 12a of the second lens 12 is -17.1. Others can be deduced by analogy, and will not be repeated below. In addition, the tables in the following embodiments correspond to the optical image capturing lens groups of the embodiments, and the definitions of the tables are the same as in this embodiment, so they will not be repeated in the following embodiments.

In the first embodiment, the relationship between the effective focal length EFL of the overall optical image capturing lens group 10 and the total length TTL is EFL/TTL=0.231.

In the first embodiment, the relationship between the focal length f1 of the first lens 11 and the focal length f2 of the second lens 12 is f1/f2=0.401.

In the first embodiment, the relationship between the focal length f3 of the third lens 13 and the effective focal length EFL of the overall optical image capturing lens group 10 is f3/EFL=1.189.

In the first embodiment, the refractive index Nd4 of the fourth lens 14 is 1.971, the dispersion coefficient Vd4 is 17.5, the refractive index Nd5 of the fifth lens 15 is 1.746, the dispersion coefficient Vd5 is 49.3, and the following relationship is satisfied: Nd4>Nd5 and Vd4 <Vd5.

In the first embodiment, the relationship between the combined focal length f45 of the fourth lens 14 and the fifth lens 15 and the focal length f3 of the third lens 13 is f3/f45=0.512.

In the first embodiment, the relationship between the radius of curvature R1 of the object side surface 11a of the first lens 11 and the effective focal length EFL of the overall optical image capturing lens group 10 is EFL/R1=-0.021.

In the first embodiment, the relationship between the focal length f1 of the first lens 11 and the effective focal length EFL of the overall optical image capturing lens group 10 is f1/EFL=-1.635.

In the first embodiment, the relationship between the focal length f5 of the fifth lens 15 and the effective focal length EFL of the overall optical image capturing lens group 10 is f5/EFL=1.004.

In the first embodiment, the distance AT56 between the image side surface 15b of the fifth lens 15 and the object side surface 16a of the sixth lens 16 on the optical axis is at the same distance from the object side surface 11a of the first lens 11 to the image side surface 16b of the sixth lens 16 The distance on the optical axis is Dr1r12, and the relationship between the two is AT56/Dr1r12=0.12.

。 In the first embodiment, the focal length f1 of the first lens 11, the refractive index Nd1, the focal length f2 of the second lens 12, the refractive index Nd2, the focal length f3 of the third lens 13, the refractive index Nd3, the focal length f4 of the fourth lens 14, The relationship between the refractive index Nd4, the focal length f5 and refractive index Nd5 of the fifth lens 15, and the focal length f6 and refractive index Nd6 of the sixth lens 16 is

.

In the first embodiment, the distance between the image side surface 11b of the first lens 11 and the object side surface 12a of the second lens 12 on the optical axis is AT12, and the relationship between the thickness CT3 of the third lens 13 on the optical axis is AT12/ CT3=2.221.

In the first embodiment, the combined focal length f23 of the second lens 12 and the third lens 13 is 4.56, the combined focal length f34 of the third lens 13 and the fourth lens 14 is 3.11, and the combined focal length of the fourth lens 14 and the fifth lens 15 f45 is 5.78, which satisfies the following relationship: f23>0, f34>0, and f45>0.

It can be seen from the values of the above relational expressions that the optical image capturing lens group 10 of the first embodiment satisfies the requirements of relational expressions (1) to (13).

1B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 10, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of visible light Off-axis light of 470nm, 550nm, 620nm and near infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.04mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.06mm; and the distortion aberration can be controlled within 22%. As shown in FIG. 1B, the optical image capturing lens assembly 10 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Second embodiment

2A and 2B, FIG. 2A is a schematic diagram of an optical image capturing lens group 20 according to a second embodiment of the present invention. FIG. 2B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the second embodiment of the present invention in order from left to right.

As shown in FIG. 2A, the optical image capturing lens group 20 of the second embodiment includes a first lens 21, a second lens 22, an aperture ST, a third lens 23, a fourth lens 24, and The fifth lens 25 and the sixth lens 26. The optical image capturing lens group 20 may further include a filter element 27, a protective glass 28, and an imaging surface 29. An image sensing element 20a can be further provided on the imaging surface 29 to form an imaging device (not labeled).

The first lens 21 has a negative refractive power, the object side 21a is convex, the image side 21b is concave, and both the object side 21a and the image side 21b are spherical. The first lens 21 is made of glass material.

The second lens 22 has a negative refractive power, the object side 22a is concave, the image side 22b is convex, and both the object side 22a and the image side 22b are aspherical. The second lens 22 is made of plastic material.

The third lens 23 has a positive refractive power, the object side surface 23a is convex, the image side surface 23b is convex, and both the object side surface 23a and the image side surface 23b are aspherical. In more detail, the image side surface 23b of the third lens 23 is a convex surface near the axis and a concave surface off the axis, and the image side surface 23b has two inflection points. The third lens 23 is made of plastic material.

The fourth lens 24 has a negative refractive power, the object side surface 24a is convex, the image side surface 24b is concave, and both the object side surface 24a and the image side surface 24b are spherical surfaces. The fourth lens 24 is made of glass material.

The fifth lens 25 has a positive refractive power, the object side surface 25a is convex, the image side surface 25b is convex, and both the object side surface 25a and the image side surface 25b are spherical surfaces. The fifth lens 25 is made of glass material. The image side surface 24b of the fourth lens 24 and the object side surface 25a of the fifth lens 25 are bonded to each other to form a cemented lens.

The sixth lens element 26 has a negative refractive power, the object side surface 26a is convex, the image side surface 26b is concave, and the object side surface 26a and the image side surface 26b of the sixth lens element are aspherical. In more detail, the object side surface 26a of the sixth lens 26 is convex at the paraxial position and concave at the off-axis position, the image side surface 26b is concave at the paraxial position and convex at the off-axis position, and the object side surface 26a of the sixth lens 26 The image side surface and the image side surface 26b each have two inflection points. The sixth lens 26 is made of plastic material.

The filter element 27 is disposed between the sixth lens 26 and the imaging surface 29 to filter out light in a specific wavelength range. Both surfaces 27a and 27b of the filter element 27 are flat surfaces, and the material is glass.

The protective glass 28 is disposed on the image sensing element 20a, and the two surfaces 28a, 28b are flat surfaces, and the material is glass.

The image sensor 20a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical image capturing lens group 20 of the second embodiment are listed in Table 3 and Table 4, respectively. In the second embodiment, the curve equation of the aspherical surface is expressed as in the first embodiment.

In the second embodiment, the values of the relational expressions of the optical image capturing lens group 20 are listed in Table 5. It can be seen from Table 5 that the optical image capturing lens group 20 of the second embodiment meets the requirements of relational expressions (1) to (13).

2B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 20, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near-infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.06mm. From the astigmatic field curve aberration diagram (wavelength 550nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.04mm; and the distortion aberration can be controlled within 15%. As shown in FIG. 2B, the optical image capturing lens group 20 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

The third embodiment

Referring to FIGS. 3A and 3B, FIG. 3A is a schematic diagram of an optical image capturing lens group 30 according to a third embodiment of the present invention. FIG. 3B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the third embodiment of the present invention in order from left to right.

As shown in FIG. 3A, the optical image capturing lens group 30 of the third embodiment sequentially includes a first lens 31, a second lens 32, an aperture ST, a third lens 33, a fourth lens 34, from the object side to the image side. The fifth lens 35 and the sixth lens 36. The optical image capturing lens group 30 can further include a filter element 37, a protective glass 38 and an imaging surface 39. An image sensing element 30a can be further provided on the imaging surface 39 to form an imaging device (not marked separately).

The first lens 31 has a negative refractive power, the object side surface 31a is a concave surface, the image side surface 31b is a concave surface, and the object side surface 31a and the image side surface 31b are both spherical surfaces. The first lens 31 is made of glass material.

The second lens 32 has a negative refractive power, the object side 32a is concave, the image side 32b is convex, and both the object side 32a and the image side 32b are aspherical. The second lens 32 is made of plastic material.

The third lens 33 has a positive refractive power, the object side 33a is convex, the image side 33b is convex, and both the object side 33a and the image side 33b are aspherical. In more detail, the image side surface 33b of the third lens 33 is convex at the paraxial position and concave at the off-axis position, and the image side surface 33b has two inflection points. The third lens 33 is made of plastic material.

The fourth lens 34 has a negative refractive power, the object side surface 34a is convex, the image side surface 34b is concave, and both the object side surface 34a and the image side surface 34b are spherical surfaces. The fourth lens 34 is made of glass material.

The fifth lens 35 has a positive refractive power, the object side surface 35a is a convex surface, the image side surface 35b is a convex surface, and both the object side surface 35a and the image side surface 35b are spherical surfaces. The fifth lens 35 is made of glass material. The image side surface 34b of the fourth lens 34 and the object side surface 35a of the fifth lens 35 are bonded to each other to form a cemented lens.

The sixth lens 36 has a negative refractive power, the object side 36a is convex, the image side 36b is concave, and the object side 36a and the image side 36b of the sixth lens are aspherical. In more detail, the object side 36a of the sixth lens 36 is convex at the paraxial position and concave at the off-axis position, the image side 36b is concave at the paraxial position and convex at the off-axis position, and the object side 36a of the sixth lens 36 The image side surface and the image side surface 36b each have two inflection points. The sixth lens 36 is made of plastic material.

The filter element 37 is disposed between the sixth lens 36 and the imaging surface 39 to filter out light in a specific wavelength range. The two surfaces 37a and 37b of the filter element 37 are flat surfaces, and the material is glass.

The protective glass 38 is disposed on the image sensor element 30a, and its two surfaces 38a, 38b are flat surfaces, and the material is glass.

The image sensor 30a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical image capturing lens group 30 of the third embodiment are listed in Table 6 and Table 7, respectively. In the third embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the third embodiment, the values of the relational expressions of the optical image capturing lens group 30 are listed in Table 8. It can be seen from Table 8 that the optical image capturing lens group 30 of the third embodiment meets the requirements of relational expressions (1) to (13).

表八

Table 8

Referring to FIG. 3B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 30, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis light with wavelengths of 470nm, 550nm, 620nm and near infrared 940nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.09mm; and the distortion aberration can be controlled within 30%. As shown in FIG. 3B, the optical image capturing lens group 30 of this embodiment has well corrected various aberrations, which meets the imaging quality requirements of the optical system.

Fourth embodiment

Referring to FIGS. 4A and 4B, FIG. 4A is a schematic diagram of an optical image capturing lens group 40 according to a fourth embodiment of the present invention. FIG. 4B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatic field curvature aberration diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the fourth embodiment of the present invention in order from left to right.

As shown in FIG. 4A, the optical image capturing lens group 40 of the fourth embodiment includes a first lens 41, a second lens 42, an aperture ST, a third lens 43, a fourth lens 44, and The fifth lens 45 and the sixth lens 46. The optical image capturing lens group 40 may further include a filter element 47, a protective glass 48 and an imaging surface 49. An image sensing element 40a can be further provided on the imaging surface 49 to form an imaging device (not marked separately).

The first lens 41 has a negative refractive power, the object side surface 41a is concave, the image side surface 41b is concave, and both the object side surface 41a and the image side surface 41b are spherical surfaces. The first lens 41 is made of glass material.

The second lens 42 has a negative refractive power, the object side 42a is concave, the image side 42b is convex, and both the object side 42a and the image side 42b are aspherical. The second lens 42 is made of plastic material.

The third lens 43 has a positive refractive power, the object side 43a is convex, the image side 43b is convex, and both the object side 43a and the image side 43b are aspherical. In more detail, the image side surface 43b of the third lens 43 is convex at the paraxial position and concave at the off-axis position, and the image side surface 43b has two inflection points. The third lens 43 is made of plastic material.

The fourth lens 44 has a negative refractive power, the object side 44a is convex, the image side 44b is concave, and both the object side 44a and the image side 44b are spherical surfaces. The fourth lens 44 is made of glass material.

The fifth lens 45 has a positive refractive power, the object side 45a is convex, the image side 45b is convex, and both the object side 45a and the image side 45b are spherical. The fifth lens 45 is made of glass material. The image side surface 44b of the fourth lens 44 and the object side surface 45a of the fifth lens 45 are bonded to each other to form a cemented lens.

The sixth lens 46 has a negative refractive power, the object side 46a is convex, the image side 46b is concave, and the object side 46a and the image side 46b of the sixth lens are aspherical. The sixth lens 46 is made of plastic material.

The filter element 47 is disposed between the sixth lens 46 and the imaging surface 49 to filter out light in a specific wavelength range. The two surfaces 47a and 47b of the filter element 47 are flat surfaces, and the material is glass.

The protective glass 48 is disposed on the image sensor 40a, and its two surfaces 48a, 48b are both flat surfaces, and its material is glass.

The image sensor 40a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens assembly 40 of the fourth embodiment are listed in Table 9 and Table 10, respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the fourth embodiment, the values of the relations of the optical image capturing lens group 40 are listed in Table 11. It can be seen from Table 11 that the optical image capturing lens group 40 of the fourth embodiment meets the requirements of relational expressions (1) to (13).

Referring to FIG. 4B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 40, respectively. It can be seen from the longitudinal spherical aberration diagram that three types of off-axis rays of visible light 470nm, 550nm, 620nm and near infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.07mm; and the distortion aberration can be controlled within 22%. As shown in FIG. 4B, the optical image capturing lens assembly 40 of this embodiment has well corrected various aberrations, which meets the imaging quality requirements of the optical system.

Fifth embodiment

Referring to FIGS. 5A and 5B, FIG. 5A is a schematic diagram of an optical image capturing lens assembly 50 according to a fifth embodiment of the present invention. Fig. 5B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism field curvature diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the fifth embodiment of the present invention in order from left to right.

As shown in FIG. 5A, the optical image capturing lens group 50 of the fifth embodiment includes a first lens 51, a second lens 52, an aperture ST, a third lens 53, a fourth lens 54 in sequence from the object side to the image side. The fifth lens 55 and the sixth lens 56. The optical image capturing lens group 50 may further include a filter element 57, a protective glass 58 and an imaging surface 59. An image sensing element 50a can be further provided on the imaging surface 59 to form an imaging device (not shown).

The first lens 51 has a negative refractive power, the object side 51a is concave, the image side 51b is concave, and both the object side 51a and the image side 51b are spherical surfaces. The first lens 51 is made of glass material.

The second lens 52 has a negative refractive power, the object side 52a is concave, the image side 52b is convex, and both the object side 52a and the image side 52b are aspherical. The second lens 52 is made of plastic material.

The third lens 53 has a positive refractive power, the object side surface 53a is convex, the image side surface 53b is convex, and the object side surface 53a and the image side surface 53b are aspherical. In more detail, the image side surface 53b of the third lens 53 is convex at the paraxial position and concave at the off-axis position, and the image side surface 53b has two inflection points. The third lens 53 is made of plastic material.

The fourth lens 54 has a negative refractive power, the object side 54a is convex, the image side 54b is concave, and both the object side 54a and the image side 54b are spherical. The fourth lens 54 is made of glass material.

The fifth lens 55 has a positive refractive power, the object side 55a is convex, the image side 55b is convex, and both the object side 55a and the image side 55b are spherical. The fifth lens 55 is made of glass material. The image side surface 54b of the fourth lens 54 and the object side surface 55a of the fifth lens 55 are bonded to each other to form a cemented lens.

The sixth lens 56 has a negative refractive power, the object side 56a is convex, the image side 56b is concave, and both the object side 56a and the image side 56b of the sixth lens are aspherical. In more detail, the object side 56a of the sixth lens 56 is convex at the paraxial position and concave at the off-axis position, the image side 56b is concave at the paraxial position and convex at the off-axis position, and the object side 56a of the sixth lens 56 The image side and the image side 56b each have two inflection points. The sixth lens 56 is made of plastic material.

The filter element 57 is disposed between the sixth lens 56 and the imaging surface 59 to filter out light in a specific wavelength range. The two surfaces 57a and 57b of the filter element 57 are flat surfaces, and the material is glass.

The protective glass 58 is disposed on the image sensor 50a, and the two surfaces 58a, 58b are both flat surfaces, and the material is glass.

The image sensor 50a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens assembly 50 of the fifth embodiment are listed in Table 12 and Table 13, respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the fifth embodiment, the values of the relational expressions of the optical image capturing lens group 50 are listed in Table 14. It can be seen from Table 14 that the optical image capturing lens group 50 of the fifth embodiment satisfies the requirements of relational expressions (1) to (13).

表十四

Table 14

Referring to FIG. 5B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 50, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near-infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.08mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.07mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.05mm; and the distortion aberration can be controlled within 30%. As shown in FIG. 5B, the optical image capturing lens assembly 50 of the present embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Sixth embodiment

Referring to FIGS. 6A and 6B, FIG. 6A is a schematic diagram of an optical image capturing lens group 60 according to a sixth embodiment of the present invention. FIG. 6B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism field curvature diagram (Astigmatism/Field Curvature) and the distortion aberration diagram (Distortion) of the sixth embodiment of the present invention in order from left to right.

As shown in FIG. 6A, the optical image capturing lens group 60 of the sixth embodiment sequentially includes a first lens 61, a second lens 62, an aperture ST, a third lens 63, a fourth lens 64, from the object side to the image side. The fifth lens 65 and the sixth lens 66. The optical image capturing lens group 60 can further include a filter element 67, a protective glass 68, and an imaging surface 69. An image sensing element 60a can be further provided on the imaging surface 69 to form an imaging device (not marked separately).

The first lens 61 has a negative refractive power, the object side surface 61a is a convex surface, the image side surface 61b is a concave surface, and both the object side surface 61a and the image side surface 61b are spherical surfaces. The first lens 61 is made of glass material.

The second lens 62 has a negative refractive power, the object side 62a is concave, the image side 62b is concave, and both the object side 62a and the image side 62b are aspherical. The second lens 62 is made of plastic material.

The third lens 63 has a positive refractive power, the object side surface 63a is convex, the image side surface 63b is convex, and both the object side surface 63a and the image side surface 63b are aspherical. In more detail, the image side surface 63b of the third lens 63 is convex at the paraxial position and concave at the off-axis position, and the image side surface 63b has two inflection points. The third lens 63 is made of plastic material.

The fourth lens 64 has a negative refractive power, the object side 64a is convex, the image side 64b is concave, and both the object side 64a and the image side 64b are spherical. The fourth lens 64 is made of glass material.

The fifth lens 65 has a positive refractive power, the object side 65a is convex, the image side 65b is convex, and both the object side 65a and the image side 65b are spherical. The fifth lens 65 is made of glass material. The image side surface 64b of the fourth lens 64 and the object side surface 65a of the fifth lens 65 are bonded to each other to form a cemented lens.

The sixth lens 66 has a negative refractive power, the object side 66a is convex, the image side 66b is concave, and the object side 66a and the image side 66b of the sixth lens are aspherical. In more detail, the object side 66a of the sixth lens 66 is convex at the paraxial position and concave at the off-axis position, the image side 66b is concave at the paraxial position and convex at the off-axis position, and the object side 66a of the sixth lens 66 The image side surface 66b has two inflection points, respectively. The sixth lens 66 is made of plastic material.

The filter element 67 is disposed between the sixth lens 66 and the imaging surface 69 to filter out light in a specific wavelength range. Both surfaces 67a and 67b of the filter element 67 are flat surfaces, and the material is glass.

The protective glass 68 is disposed on the image sensor 60a, and its two surfaces 68a and 68b are flat surfaces, and the material is glass.

The image sensor 60a is, for example, a Charge-Coupled Device (CCD) Image Sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 60 of the sixth embodiment are listed in Table 15 and Table 16, respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the sixth embodiment, the numerical values of the relational expressions of the optical image capturing lens group 60 are listed in Table 17. It can be seen from Table 17 that the optical image capturing lens group 60 of the sixth embodiment meets the requirements of the relational expressions (1) to (13).

Referring to FIG. 6B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 60, respectively. It can be seen from the longitudinal spherical aberration diagram that three types of off-axis rays of visible light 470nm, 550nm, 620nm and near infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.05mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.06mm; and the distortion aberration can be controlled within 30%. As shown in FIG. 6B, the optical image capturing lens group 60 of this embodiment has well corrected various aberrations, which meets the imaging quality requirements of the optical system.

Seventh embodiment

Referring to FIGS. 7A and 7B, FIG. 7A is a schematic diagram of an optical image capturing lens group 70 according to a seventh embodiment of the present invention. FIG. 7B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism field curvature diagram (Astigmatism/Field Curvature) and the distortion aberration diagram (Distortion) of the seventh embodiment of the present invention in order from left to right.

As shown in FIG. 7A, the optical image capturing lens group 70 of the seventh embodiment sequentially includes a first lens 71, a second lens 72, an aperture ST, a third lens 73, a fourth lens 74, from the object side to the image side. The fifth lens 75 and the sixth lens 76. The optical image capturing lens group 70 may further include a filter element 77, a protective glass 78 and an imaging surface 79. An image sensing element 70a can be further provided on the imaging surface 79 to form an imaging device (not labeled).

The first lens 71 has a negative refractive power, the object side 71a is concave, the image side 71b is concave, and both the object side 71a and the image side 71b are spherical surfaces. The first lens 71 is made of glass material.

The second lens 72 has a negative refractive power, the object side 72a is concave, the image side 72b is concave, and both the object side 72a and the image side 72b are aspherical. The second lens 72 is made of plastic material.

The third lens 73 has a positive refractive power, the object side surface 73a is convex, the image side surface 73b is convex, and the object side surface 73a and the image side surface 73b are aspherical. In more detail, the image side surface 73b of the third lens 73 is convex at the paraxial position and concave at the off-axis position, and the image side surface 73b has two inflection points. The third lens 73 is made of plastic material.

The fourth lens 74 has a negative refractive power, the object side 74a is convex, the image side 74b is concave, and both the object side 74a and the image side 74b are spherical. The fourth lens 74 is made of glass material.

The fifth lens 75 has a positive refractive power, the object side 75a is convex, the image side 75b is convex, and both the object side 75a and the image side 75b are spherical. The fifth lens 75 is made of glass material. The image side surface 74b of the fourth lens 74 and the object side surface 75a of the fifth lens 75 are bonded to each other to form a cemented lens.

The sixth lens 76 has a negative refractive power, the object side 76a is convex, the image side 76b is concave, and both the object side 76a and the image side 76b of the sixth lens are aspherical. In more detail, the object side 76a of the sixth lens 76 is convex near the axis and concave off the axis, the image side 76b is concave at the paraxial and convex off the axis, and the object side 76a of the sixth lens 76 And the image side 76b has two inflection points respectively. The sixth lens 76 is made of plastic material.

The filter element 77 is disposed between the sixth lens 76 and the imaging surface 79 to filter out light in a specific wavelength range. Both surfaces 77a and 77b of the filter element 77 are flat surfaces, and the material is glass.

The protective glass 78 is disposed on the image sensing element 70a, and its two surfaces 78a, 78b are flat surfaces, and the material is glass.

The image sensor 70a is, for example, a charge-coupled device (CCD) Image Sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 70 of the seventh embodiment are listed in Table 18 and Table 19, respectively. In the seventh embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the seventh embodiment, the values of the relational expressions of the optical image capturing lens group 70 are listed in Table 20. It can be seen from Table 20 that the optical image capturing lens group 70 of the seventh embodiment meets the requirements of the relational expressions (1) to (13).

表二十

Table 20

Referring to FIG. 7B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 70, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near-infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.04mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.06mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.03mm; and the distortion aberration can be controlled within 35%. As shown in FIG. 7B, the optical image capturing lens assembly 70 of the present embodiment has well corrected various aberrations, which meets the imaging quality requirements of the optical system.

Eighth embodiment

Referring to FIGS. 8A and 8B, FIG. 8A is a schematic diagram of an optical image capturing lens group 80 according to an eighth embodiment of the present invention. FIG. 8B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism/Field Curvature diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the eighth embodiment of the present invention in order from left to right.

As shown in FIG. 8A, the optical image capturing lens group 80 of the eighth embodiment includes a first lens 81, a second lens 82, an aperture ST, a third lens 83, a fourth lens 84, and The fifth lens 85 and the sixth lens 86. The optical image capturing lens group 80 may further include a filter element 87, a protective glass 88 and an imaging surface 89. An image sensing element 80a can be further provided on the imaging surface 89 to constitute an imaging device (not marked separately).

The first lens 81 has a negative refractive power, the object side 81a is concave, the image side 81b is concave, and both the object side 81a and the image side 81b are spherical. The first lens 81 is made of glass material.

The second lens 82 has a negative refractive power, the object side 82a is concave, the image side 82b is convex, and both the object side 82a and the image side 82b are aspherical. The second lens 82 is made of plastic material.

The third lens 83 has a positive refractive power, the object side 83a is convex, the image side 83b is convex, and both the object side 83a and the image side 83b are aspherical. In more detail, the image side surface 83b of the third lens 83 is convex at the paraxial position and concave surface off the axis, and the image side surface 83b has two inflection points. The third lens 83 is made of plastic material.

The fourth lens 84 has a negative refractive power, the object side surface 84a is convex, the image side surface 84b is concave, and both the object side surface 84a and the image side surface 84b are spherical surfaces. The fourth lens 84 is made of glass material.

The fifth lens 85 has a positive refractive power, the object side surface 85a is convex, the image side surface 85b is convex, and both the object side surface 85a and the image side surface 85b are spherical surfaces. The fifth lens 85 is made of glass material. The image side surface 84b of the fourth lens 84 and the object side surface 85a of the fifth lens 85 are bonded to each other to form a cemented lens.

The sixth lens 86 has a negative refractive power, the object side 86a is convex, the image side 86b is concave, and both the object side 86a and the image side 86b of the sixth lens are aspherical. In more detail, the object side 86a of the sixth lens 86 is convex near the axis and concave off the axis, the image side 86b is concave at the paraxial and convex off the axis, and the object side 86a of the sixth lens 86 And the image side 86b has two inflection points respectively. The sixth lens 86 is made of plastic material.

The filter element 87 is disposed between the sixth lens 86 and the imaging surface 89 to filter out light in a specific wavelength range. The two surfaces 87a and 87b of the filter element 87 are flat surfaces, and the material is glass.

The protective glass 88 is disposed on the image sensing element 80a, and its two surfaces 88a and 88b are flat surfaces, and the material is glass.

The image sensor element 80a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 80 of the eighth embodiment are listed in Table 21 and Table 22, respectively. In the eighth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the eighth embodiment, the values of the relational expressions of the optical image capturing lens group 80 are listed in Table 23. It can be seen from Table 23 that the optical image capturing lens group 80 of the eighth embodiment satisfies the requirements of relational expressions (1) to (13).

Referring to FIG. 8B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 80, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.1mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.08mm; the meridional aberration is the focal length of the entire field of view. The amount of change is within ±0.09mm; and the distortion aberration can be controlled within 35%. As shown in FIG. 8B, the optical image capturing lens assembly 80 of the present embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Ninth embodiment

Referring to FIGS. 9A and 9B, FIG. 9A is a schematic diagram of an optical image capturing lens group 90 according to a ninth embodiment of the present invention. FIG. 9B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism field curvature diagram (Astigmatism/Field Curvature) and the distortion aberration diagram (Distortion) of the ninth embodiment of the present invention in order from left to right.

As shown in FIG. 9A, the optical image capturing lens group 90 of the ninth embodiment includes a first lens 91, a second lens 92, an aperture ST, a third lens 93, a fourth lens 94, and The fifth lens 95 and the sixth lens 96. The optical image capturing lens group 90 can further include a filter element 97, a protective glass 98 and an imaging surface 99. An image sensing element 90a can be further provided on the imaging surface 99 to form an imaging device (not marked separately).

The first lens 91 has a negative refractive power, the object side 91a is convex, the image side 91b is concave, and both the object side 91a and the image side 91b are spherical. The first lens 91 is made of glass material.

The second lens 92 has a negative refractive power, the object side 92a is concave, the image side 92b is convex, and both the object side 92a and the image side 92b are aspherical. The second lens 92 is made of plastic material.

The third lens 93 has a positive refractive power, the object side surface 93a is convex, the image side surface 93b is convex, and the object side surface 93a and the image side surface 93b are aspherical. In more detail, the image side surface 93b of the third lens 93 is convex at the paraxial position and concave at the off-axis position, and the image side surface 93b has two inflection points. The third lens 93 is made of plastic material.

The fourth lens 94 has a negative refractive power, the object side surface 94a is convex, the image side surface 94b is concave, and both the object side surface 94a and the image side surface 94b are spherical surfaces. The fourth lens 94 is made of glass material.

The fifth lens 95 has a positive refractive power, the object side 95a is convex, the image side 95b is convex, and both the object side 95a and the image side 95b are spherical surfaces. The fifth lens 95 is made of glass material. The image side surface 94b of the fourth lens 94 and the object side surface 95a of the fifth lens 95 are bonded to each other to form a cemented lens.

The sixth lens 96 has a negative refractive power, the object side 96a is convex, the image side 96b is concave, and both the object side 96a and the image side 96b of the sixth lens are aspherical. In more detail, the object side 96a of the sixth lens 96 is convex at the paraxial position and concave at the off-axis position, the image side 96b is concave at the paraxial position and convex at the off-axis position, and the object side 96a of the sixth lens 96 And the image side 96b has two inflection points respectively. The sixth lens 96 is made of plastic material.

The filter element 97 is disposed between the sixth lens 96 and the imaging surface 99 to filter out light in a specific wavelength range. Both surfaces 97a and 97b of the filter element 97 are flat surfaces, and the material is glass.

The protective glass 98 is disposed on the image sensor 90a, and its two surfaces 98a and 98b are both flat surfaces, and the material is glass.

The image sensor 90a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 90 of the ninth embodiment are listed in Table 24 and Table 25, respectively. In the ninth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the ninth embodiment, the numerical values of the relations of the optical image capturing lens group 90 are listed in Table 26. It can be seen from Table 26 that the optical image capturing lens group 90 of the ninth embodiment meets the requirements of relational expressions (1) to (13).

表二十六

Table 26

Referring to FIG. 9B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 90 respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis light with wavelengths of 470nm, 550nm, 620nm and near infrared 940nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.08mm; and the distortion aberration can be controlled within 20%. As shown in FIG. 9B, the optical image capturing lens group 90 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Tenth embodiment

Referring to FIGS. 10A and 10B, FIG. 10A is a schematic diagram of an optical image capturing lens assembly 100 according to a tenth embodiment of the present invention. FIG. 10B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatic field curvature aberration diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the tenth embodiment of the present invention in order from left to right.

As shown in FIG. 10A, the optical image capturing lens group 100 of the tenth embodiment includes a first lens 101, a second lens 102, an aperture ST, a third lens 103, a fourth lens 104, and The fifth lens 105 and the sixth lens 106. The optical image capturing lens assembly 100 may further include a filter element 107, a protective glass 108 and an imaging surface 109. An image sensing element 100a can be further provided on the imaging surface 109 to form an imaging device (not marked separately).

The first lens 101 has a negative refractive power, the object side surface 101a is convex, the image side surface 101b is concave, and both the object side surface 101a and the image side surface 101b are spherical surfaces. The first lens 101 is made of glass material.

The second lens 102 has a negative refractive power, the object side 102a is concave, the image side 102b is convex, and both the object side 102a and the image side 102b are aspherical. The second lens 102 is made of plastic material.

The third lens 103 has positive refractive power, the object side surface 103a is convex, the image side surface 103b is convex, and both the object side surface 103a and the image side surface 103b are aspherical. In more detail, the image side surface 103b of the third lens 103 is convex at the paraxial position and concave at the off-axis position, and the image side surface 103b has two inflection points. The third lens 103 is made of plastic material.

The fourth lens 104 has a negative refractive power, the object side 104a is convex, the image side 104b is concave, and both the object side 104a and the image side 104b are spherical. The fourth lens 104 is made of glass material.

The fifth lens 105 has a positive refractive power, the object side surface 105a is convex, the image side surface 105b is convex, and both the object side surface 105a and the image side surface 105b are spherical surfaces. The fifth lens 105 is made of glass material. The image side surface 104b of the fourth lens 104 and the object side surface 105a of the fifth lens 105 are bonded to each other to form a cemented lens.

The sixth lens 106 has a negative refractive power, the object side 106a is convex, the image side 106b is concave, and the object side 106a and the image side 106b of the sixth lens are aspherical. In more detail, the object side 106a of the sixth lens 106 is convex at the paraxial position and concave at the off-axis position, the image side 106b is concave at the paraxial position and convex at the off-axis position, and the object side 106a of the sixth lens 106 And the image side 106b has two inflection points respectively. The sixth lens 106 is made of plastic material.

The filter element 107 is disposed between the sixth lens 106 and the imaging surface 109 to filter out light in a specific wavelength range. Both surfaces 107a and 107b of the filter element 107 are flat surfaces, and the material is glass.

The protective glass 108 is disposed on the image sensor 100a, and its two surfaces 108a and 108b are both flat surfaces, and the material is glass.

The image sensor 100a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens assembly 100 of the tenth embodiment are listed in Table 27 and Table 28, respectively. In the tenth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the tenth embodiment, the values of the relational expressions of the optical image capturing lens group 100 are listed in Table 29. It can be seen from Table 29 that the optical image capturing lens group 100 of the tenth embodiment satisfies the requirements of relational expressions (1) to (13).

Referring to FIG. 10B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the distortion aberration diagram of the optical image capturing lens group 100 respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis light with wavelengths of 470nm, 550nm, 620nm and near infrared 940nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the astigmatic field curve aberration diagram (wavelength 550nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.04mm; and the distortion aberration can be controlled within 25%. As shown in FIG. 10B, the optical image capturing lens assembly 100 of the present embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Eleventh embodiment

Referring to FIGS. 11A and 11B, FIG. 11A is a schematic diagram of an optical image capturing lens assembly 110 according to an eleventh embodiment of the present invention. FIG. 11B is a longitudinal spherical aberration map (Longitudinal Spherical Aberration), an astigmatism field curvature map (Astigmatism/Field Curvature) and a distortion aberration map (Distortion) in order from left to right of the eleventh embodiment of the present invention.

As shown in FIG. 11A, the optical image capturing lens group 110 of the eleventh embodiment includes a first lens 111, a second lens 112, an aperture ST, a third lens 113, and a fourth lens 114 in sequence from the object side to the image side. , The fifth lens 115 and the sixth lens 116. The optical image capturing lens group 110 may further include a filter element 117, a protective glass 118 and an imaging surface 119. An image sensing element 110a can be further provided on the imaging surface 119 to form an imaging device (not labeled).

The first lens 111 has a negative refractive power, the object side surface 111a is concave, the image side surface 111b is concave, and both the object side surface 111a and the image side surface 111b are spherical surfaces. The first lens 111 is made of glass material.

The second lens 112 has a negative refractive power, the object side 112a is concave, the image side 112b is concave, and both the object side 112a and the image side 112b are aspherical. The second lens 112 is made of plastic material.

The third lens 113 has positive refractive power, the object side surface 113a is convex, the image side surface 113b is convex, and both the object side surface 113a and the image side surface 113b are aspherical. In more detail, the image side surface 113b of the third lens 113 is convex at the paraxial position and concave surface off the axis, and the image side surface 113b has two inflection points. The third lens 113 is made of plastic material.

The fourth lens 114 has a negative refractive power, the object side 114a is convex, the image side 114b is concave, and both the object side 114a and the image side 114b are spherical. The fourth lens 114 is made of glass material.

The fifth lens 115 has a positive refractive power, the object side 115a is convex, the image side 115b is convex, and both the object side 115a and the image side 115b are spherical surfaces. The fifth lens 115 is made of glass material. The image side surface 114b of the fourth lens 114 and the object side surface 115a of the fifth lens 115 are bonded to each other to form a cemented lens.

The sixth lens element 116 has a negative refractive power, the object side surface 116a is convex, the image side surface 116b is concave, and the object side surface 116a and the image side surface 116b of the sixth lens element are aspherical. In more detail, the object side 116a of the sixth lens 116 is convex at the paraxial position and concave at the off-axis position, the image side 116b is concave at the paraxial position and convex at the off-axis position, and the object side 116a of the sixth lens 116 is And the image side surface 116b has two inflection points respectively. The sixth lens 116 is made of plastic material.

The filter element 117 is disposed between the sixth lens 116 and the imaging surface 119 to filter out light in a specific wavelength range. Both surfaces 117a and 117b of the filter element 117 are flat surfaces, and the material is glass.

The protective glass 118 is disposed on the image sensor 110a, and its two surfaces 118a, 118b are both flat surfaces, and the material is glass.

The image sensor 110a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 110 of the eleventh embodiment are listed in Table 30 and Table 31, respectively. In the eleventh embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the eleventh embodiment, the values of the relational expressions of the optical image capturing lens group 110 are listed in Table 32. It can be seen from Table 32 that the optical image capturing lens group 110 of the eleventh embodiment satisfies the requirements of relational expressions (1) to (13).

Referring to FIG. 11B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 110 respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near-infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.04mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.06mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.07mm; and the distortion aberration can be controlled within 40%. As shown in FIG. 11B, the optical image capturing lens assembly 110 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Twelfth embodiment

Referring to FIGS. 12A and 12B, FIG. 12A is a schematic diagram of an optical image capturing lens group 120 according to a twelfth embodiment of the present invention. Fig. 12B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism field curvature diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the twelfth embodiment of the present invention in order from left to right.

As shown in FIG. 12A, the optical image capturing lens group 120 of the twelfth embodiment includes a first lens 121, a second lens 122, a third lens 123, an aperture ST, and a fourth lens 124 in sequence from the object side to the image side. , The fifth lens 125 and the sixth lens 126. The optical image capturing lens group 120 may further include filter elements Piece 127, protective glass 128 and imaging surface 129. An image sensing element 120a can be further provided on the imaging surface 129 to form an imaging device (not shown).

The first lens 121 has a negative refractive power, the object side surface 121a is a convex surface, the image side surface 121b is a concave surface, and the object side surface 121a and the image side surface 121b are both spherical surfaces. The first lens 121 is made of glass material.

The second lens 122 has a negative refractive power, the object side 122a is concave, the image side 122b is convex, and both the object side 122a and the image side 122b are aspherical. In more detail, the image side surface 122b of the second lens 122 is a convex surface near the optical axis and a concave surface off the axis, and the image side surface 122b of the second lens 122 has two inflection points. The second lens 122 is made of plastic material.

The third lens 123 has positive refractive power, the object side surface 123a is convex, the image side surface 123b is convex, and both the object side surface 123a and the image side surface 123b are aspherical. The third lens 123 is made of plastic material.

The fourth lens element 124 has a negative refractive power, the object side surface 124a is convex, the image side surface 124b is concave, and both the object side surface 124a and the image side surface 124b are spherical surfaces. The fourth lens 124 is made of glass material.

The fifth lens 125 has a positive refractive power, the object side 125a is convex, the image side 125b is convex, and both the object side 125a and the image side 125b are spherical. The fifth lens 125 is made of glass material. The image side surface 124b of the fourth lens 124 and the object side surface 125a of the fifth lens 125 are bonded to each other to form a cemented lens.

The sixth lens element 126 has a negative refractive power, the object side surface 126a is convex, the image side surface 126b is concave, and the object side surface 126a and the image side surface 126b of the sixth lens element are aspherical. In more detail, the object side surface 126a of the sixth lens 126 is convex at the paraxial position and concave at the off-axis position; the image side of the sixth lens 126 The surface 126b is a concave surface near the axis and a convex surface away from the axis; the object side surface 126a and the image side surface 126b of the sixth lens 126 have two inflection points respectively. The sixth lens 126 is made of plastic material.

The filter element 127 is disposed between the sixth lens 126 and the imaging surface 129 to filter out light in a specific wavelength range. Both surfaces 127a and 127b of the filter element 127 are flat surfaces, and the material is glass.

The protective glass 128 is disposed on the image sensor 120a, and the two surfaces 128a and 128b are both flat surfaces, and the material is glass.

The image sensor 120a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 120 of the twelfth embodiment are listed in Table 33 and Table 34, respectively. In the twelfth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the twelfth embodiment, the values of the relational expressions of the optical image capturing lens group 120 are listed in Table 35. It can be seen from Table 35 that the optical image capturing lens group 120 of the twelfth embodiment meets the requirements of relational expressions (1) to (13).

Referring to FIG. 12B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 120 from left to right. It can be seen from the longitudinal spherical aberration diagram that three types of off-axis rays of visible light 470nm, 550nm, 620nm and near infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.05mm; and the distortion aberration can be controlled within 35%. As shown in FIG. 12B, the optical image capturing lens group 120 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Thirteenth embodiment

Referring to FIGS. 13A and 13B, FIG. 13A is a schematic diagram of an optical image capturing lens group 130 according to a thirteenth embodiment of the present invention. FIG. 13B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatic field curvature aberration diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the thirteenth embodiment of the present invention in order from left to right.

As shown in FIG. 13A, the optical image capturing lens group 130 of the thirteenth embodiment includes a first lens 131, a second lens 132, a third lens 133, an aperture ST, and a fourth lens 134 in sequence from the object side to the image side. , The fifth lens 135 and the sixth lens 136. The optical image capturing lens group 130 may further include a filter element 137, a protective glass 138 and an imaging surface 139. An image sensing element 130a can be further provided on the imaging surface 139 to form an imaging device (not labeled).

The first lens 131 has a negative refractive power, the object side surface 131a is convex, the image side surface 131b is concave, and both the object side surface 131a and the image side surface 131b are spherical surfaces. The first lens 131 is made of glass material.

The second lens 132 has a negative refractive power, the object side surface 132a is concave, the image side surface 132b is convex, and both the object side surface 132a and the image side surface 132b are aspherical. In more detail, the image side surface 132b of the second lens 132 is convex at the paraxial position and concave surface off the axis, and the image side surface 132b of the second lens 132 has two inflection points. The second lens 132 is made of plastic material.

The third lens 133 has positive refractive power, the object side surface 133a is convex, the image side surface 133b is convex, and both the object side surface 133a and the image side surface 133b are aspherical. The third lens 133 is made of plastic material.

The fourth lens 134 has a negative refractive power, the object side surface 134a is convex, the image side surface 134b is concave, and both the object side surface 134a and the image side surface 134b are spherical surfaces. The fourth lens 134 is made of glass material.

The fifth lens 135 has a positive refractive power, the object side surface 135a is convex, the image side surface 135b is convex, and both the object side surface 135a and the image side surface 135b are spherical surfaces. The fifth lens 135 is made of glass. The image side surface 134b of the fourth lens 134 and the object side surface 135a of the fifth lens 135 are bonded to each other to form a cemented lens.

The sixth lens element 136 has negative refractive power, the object side surface 136a is concave, the image side surface 136b is concave, and the object side surface 136a and the image side surface 136b of the sixth lens element are aspherical. In more detail, the image side surface 136b of the sixth lens 136 is concave at the paraxial position and convex surface at the off-axis. The image side surface 136b of the sixth lens 136 has two inflection points. The sixth lens 136 is made of plastic material.

The filter element 137 is disposed between the sixth lens 136 and the imaging surface 139 to filter out light in a specific wavelength range. Both surfaces 137a and 137b of the filter element 137 are flat surfaces, and the material is glass.

The protective glass 138 is disposed on the image sensing element 130a, and the two surfaces 138a, 138b are both flat surfaces, and the material is glass.

The image sensor 130a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical image capturing lens group 130 of the thirteenth embodiment are listed in Table 36 and Table 37, respectively. In the thirteenth embodiment, the aspherical curve equation is expressed as in the first embodiment.

In the thirteenth embodiment, the values of the relations of the optical image capturing lens group 130 are listed in Table 38. It can be seen from Table 38 that the optical image capturing lens group 130 of the thirteenth embodiment satisfies the requirements of relational expressions (1) to (13).

Referring to FIG. 13B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 130, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near-infrared 940nm wavelengths at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.02mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.05mm; and the distortion aberration can be controlled within 30%. As shown in FIG. 13B, the optical image capturing lens group 130 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Fourteenth embodiment

Referring to FIGS. 14A and 14B, FIG. 14A is a schematic diagram of an optical image capturing lens group 140 according to a fourteenth embodiment of the present invention. Figure 14B shows the longitudinal direction of the fourteenth embodiment of the present invention from left to right Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion.

As shown in FIG. 14A, the optical image capturing lens group 140 of the fourteenth embodiment sequentially includes a first lens 141, a second lens 142, an aperture ST, a third lens 143, and a fourth lens 144 from the object side to the image side. , The fifth lens 145 and the sixth lens 146. The optical image capturing lens group 140 may further include a filter element 147, a protective glass 148 and an imaging surface 149. An image sensing element 140a can be further provided on the imaging surface 149 to form an imaging device (not marked separately).

The first lens 141 has a negative refractive power, the object side surface 141a is concave, the image side surface 141b is concave, and both the object side surface 141a and the image side surface 141b are spherical surfaces. The first lens 141 is made of glass material.

The second lens 142 has negative refractive power, the object side surface 142a is concave, the image side surface 142b is concave, and both the object side surface 142a and the image side surface 142b are aspherical. In more detail, the image side surface 142b of the second lens 142 is concave at the paraxial number and convex surface off the axis, and the image side surface 142b of the second lens 142 has two inflection points. The second lens 142 is made of plastic material.

The third lens 143 has positive refractive power, the object side surface 143a is convex, the image side surface 143b is convex, and both the object side surface 143a and the image side surface 143b are aspherical. In more detail, the image side surface 143b of the third lens 143 is convex at the paraxial position and concave surface off the axis, and the image side surface 143b has two inflection points. The third lens 143 is made of plastic material.

The fourth lens 144 has a negative refractive power, the object side surface 144a is convex, the image side surface 144b is concave, and both the object side surface 144a and the image side surface 144b are spherical surfaces. The fourth lens 144 is made of glass material.

The fifth lens element 145 has a positive refractive power, the object side surface 145a is convex, the image side surface 145b is convex, and both the object side surface 145a and the image side surface 145b are spherical surfaces. The fifth lens 145 is made of glass material. The image side surface 144b of the fourth lens 144 and the object side surface 145a of the fifth lens 145 are bonded to each other to form a cemented lens.

The sixth lens element 146 has a negative refractive power, the object side surface 146a is convex, the image side surface 146b is concave, and the object side surface 146a and the image side surface 146b of the sixth lens element are aspherical. In more detail, the object side surface 146a of the sixth lens element 146 is convex at the paraxial position and concave surface off the axis, the image side surface 146b is concave at the paraxial position and convex surface off the axis, and the object side surface 146a of the sixth lens 146 The image side surface and the image side surface 146b each have two inflection points. The sixth lens 146 is made of plastic material.

The filter element 147 is disposed between the sixth lens 146 and the imaging surface 149 to filter out light in a specific wavelength range. Both surfaces 147a and 147b of the filter element 147 are flat surfaces, and the material is glass.

The protective glass 148 is disposed on the image sensing element 140a, and its two surfaces 148a, 148b are both flat surfaces, and its material is glass.

The image sensor element 140a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 140 of the fourteenth embodiment are listed in Table 39 and Table 40, respectively. In the fourteenth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the fourteenth embodiment, the values of the relational expressions of the optical image capturing lens group 140 are listed in Table 41. It can be seen from Table 41 that the optical image capturing lens group 140 of the fourteenth embodiment meets the requirements of relational expressions (1) to (13).

Referring to FIG. 14B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 140, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light 470nm, 550nm, 620nm and near-infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the imaging point deviation can be controlled within ±0.04mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. Change within ±0.05mm Within; and the distortion aberration can be controlled within 30%. As shown in FIG. 14B, the optical image capturing lens group 140 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Fifteenth embodiment

Referring to FIGS. 15A and 15B, FIG. 15A is a schematic diagram of an optical image capturing lens group 150 according to a fifteenth embodiment of the present invention. Fig. 15B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism field curvature diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the fifteenth embodiment of the present invention in order from left to right.

As shown in FIG. 15A, the optical image capturing lens group 150 of the fifteenth embodiment includes a first lens 151, a second lens 152, an aperture ST, a third lens 153, and a fourth lens 154 in sequence from the object side to the image side. , The fifth lens 155 and the sixth lens 156. The optical image capturing lens group 150 may further include a filter element 157, a protective glass 158 and an imaging surface 159. An image sensing element 150a can be further provided on the imaging surface 159 to form an imaging device (not shown).

The first lens 151 has a negative refractive power, the object side surface 151a is concave, the image side surface 151b is concave, and both the object side surface 151a and the image side surface 151b are spherical surfaces. The first lens 151 is made of glass material.

The second lens 152 has a negative refractive power, the object side surface 152a is concave, the image side surface 152b is convex, and both the object side surface 152a and the image side surface 152b are aspherical. In more detail, the image side surface 152b of the second lens 152 is convex at the paraxial number and concave surface off-axis, and the image side surface 152b of the second lens 152 has two inflection points. The second lens 152 is made of glass material.

The third lens 153 has positive refractive power, the object side surface 153a is convex, the image side surface 153b is convex, and both the object side surface 153a and the image side surface 153b are aspherical. In more detail, the third lens 153 The image side surface 153b is convex at the paraxial position and concave surface away from the axis. The image side surface 153b has two inflection points. The third lens 153 is made of glass material.

The fourth lens 154 has a negative refractive power, the object side surface 154a is convex, the image side surface 154b is concave, and both the object side surface 154a and the image side surface 154b are spherical surfaces. The fourth lens 154 is made of glass material.

The fifth lens 155 has a positive refractive power, the object side surface 155a is convex, the image side surface 155b is convex, and both the object side surface 155a and the image side surface 155b are spherical surfaces. The fifth lens 155 is made of glass material.

The sixth lens element 156 has a negative refractive power, the object side surface 156a is convex, the image side surface 156b is concave, and the object side surface 156a and the image side surface 156b of the sixth lens element are aspherical. In more detail, the object side surface 156a of the sixth lens 156 is convex at the paraxial position and concave at the off-axis position, the image side surface 156b is concave at the paraxial position and convex at the off-axis position, and the object side surface 156a of the sixth lens 156 is The image side and the image side 156b each have two inflection points. The sixth lens 156 is made of glass material.

The filter element 157 is disposed between the sixth lens 156 and the imaging surface 159 to filter out light in a specific wavelength range. The two surfaces 157a and 157b of the filter element 157 are flat surfaces, and the material is glass.

The protective glass 158 is disposed on the image sensor 150a, and the two surfaces 158a, 158b are both flat surfaces, and the material is glass.

The image sensor 150a is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor image sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 150 of the fifteenth embodiment are listed in Table 42 and Table 43, respectively. In the fifteenth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the fifteenth embodiment, the values of the relational expressions of the optical image capturing lens group 150 are listed in Table 44. It can be seen from Table 44 that the optical image capturing lens group 150 of the fifteenth embodiment satisfies the requirements of relational expressions (1) to (13).

Referring to FIG. 15B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 150, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of visible light Off-axis light of 470nm, 550nm, 620nm and near infrared 940nm wavelength at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.04mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.07mm; and the distortion aberration can be controlled within 25%. As shown in FIG. 15B, the optical image capturing lens group 150 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Sixteenth embodiment

The sixteenth embodiment of the present invention is an imaging device. The imaging device includes the optical image capturing lens group as described in the first to fifteenth embodiments, and an image sensing element; wherein, the image sensing element is, for example, provided On the imaging surface of the optical image capturing lens group. The image sensor device is, for example, a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensor device. The imaging device is, for example, a camera module for car photography, a camera module for portable electronic products, or a camera module for surveillance cameras.

Seventeenth embodiment

Please refer to FIG. 16, which is a schematic diagram of an electronic device 1000 according to a seventeenth embodiment of the present invention. As shown in the figure, the electronic device 1000 includes an imaging device 1010 and a near-infrared emitting element 1020. The imaging device 1010 is, for example, the imaging device of the aforementioned sixteenth embodiment, which can be composed of the optical image capturing lens group of the present invention and an image sensing element. The near-infrared emitting element 1020 is, for example, a near-infrared lamp for emitting a near-infrared beam with a wavelength of 940 nm. In this way, the user can use the electronic device 1000 to perform image capture in two wavelength ranges of visible light or near infrared according to environmental requirements. The electronic device 1000 is, for example, a driving monitoring device or a surveillance camera.

Although the present invention is described using the foregoing several embodiments, these embodiments are not intended to limit the scope of the present invention. For those with ordinary knowledge in the technical field to which the present invention belongs, without departing from the spirit and scope of the present invention, various changes in form and details can still be made with reference to the contents of the embodiments disclosed in the present invention. Therefore, it should be understood here that the present invention is subject to the scope of the following patent applications. Any changes made within the scope of the patent application or its equivalent scope shall still fall into the application of the present invention Within the scope of the patent.

10: Optical image capture lens group

11: The first lens

12: second lens

13: The third lens

14: The fourth lens

15: fifth lens

16: sixth lens

17: filter element

18: protective glass

19: imaging surface

11a: Object side of the first lens

11b: The side of the image of the first lens

12a: Object side of the second lens

12b: The image side of the second lens

13a: Object side of the third lens

13b: The image side of the third lens

14a: Object side of the fourth lens

14b: The image side of the fourth lens

15a: The object side of the fifth lens

15b: The image side of the fifth lens

16a: The object side of the sixth lens

16b: The image side of the sixth lens

17a, 17b: The second surface of the filter element

18a, 18b: Protect the second surface of glass

10a: Image sensor

I: Optical axis

ST: aperture

Claims (18)

An optical image capturing lens group, from the object side to the image side, sequentially includes: a first lens with negative refractive power and a concave image side surface; a second lens with negative refractive power and a concave object side surface; A third lens with positive refractive power, the object side is convex, and the image side is convex; a fourth lens, with negative refractive power, the object side is convex and the image side is concave; a fifth lens, with positive refractive The object side surface is convex and the image side surface is convex, wherein the fourth lens and the fifth lens form a cemented lens; and a sixth lens with negative refractive power and the image side surface is concave; The image capturing lens group further includes an aperture, which is arranged between the second lens and the fourth lens; the total number of lenses in the optical image capturing lens group is six; the effective focal length of the optical image capturing lens group For EFL, the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis is TTL, which satisfies the following relationship: 0.17<EFL/TTL<0.35. For example, the optical image capturing lens group of the first item in the scope of patent application, wherein the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfies the following relationship: 0.25<f1/f2<0.95. For example, the optical image capturing lens group of item 1 in the scope of patent application, wherein the focal length of the third lens is f3, and the effective focal length of the optical image capturing lens group is EFL, which satisfies the following relationship: 0.8<f3/EFL <2.4. An optical image capturing lens group, which sequentially includes from the object side to the image side: a first lens with negative refractive power and a concave image side surface; A second lens has negative refractive power and its object side surface is concave; a third lens has positive refractive power, its object side surface is convex, and its image side surface is convex; a fourth lens has negative refractive power its object side surface A convex surface and a concave image side surface; a fifth lens with positive refractive power, a convex object side surface, and a convex image side surface; and a sixth lens with negative refractive power, a concave image side surface; wherein, the optical The image capturing lens group further includes an aperture, which is arranged between the second lens and the fourth lens; the focal length of the third lens is f3, which is between the effective focal length EFL of the optical image capturing lens group , The system satisfies the following relationship: 0.8<f3/EFL<2.4. For example, the optical image capturing lens group of item 4 of the scope of patent application, wherein the fourth lens and the fifth lens form a cemented lens. For example, the optical image capturing lens group of item 4 of the scope of patent application, wherein the effective focal length of the optical image capturing lens group is EFL, and the object side of the first lens to the imaging surface of the optical image capturing lens group is in light The distance on the axis is TTL, which satisfies the following relationship: 0.17<EFL/TTL<0.35. For example, the optical image capturing lens group of item 4 in the scope of patent application, wherein the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfies the following relationship: 0.25<f1/f2<0.95. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the refractive index of the fourth lens is Nd4, the refractive index of the fifth lens is Nd5, and the dispersion coefficient of the fourth lens is Vd4 , The dispersion coefficient of the fifth lens is Vd5, which satisfies the following relationship: Nd4>Nd5; and Vd4<Vd5. For example, the optical image capturing lens set of item 1 or item 4 of the scope of patent application, wherein the combined focal length of the fourth lens and the fifth lens is f45, and the focal length between it and the third lens f3 satisfies The following relationship: 0.4<f3/f45<1.7. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the curvature radius of the object side of the first lens is R1, which is between the effective focal length EFL of the optical image capturing lens group, The system satisfies the following relationship: -0.1<EFL/R1<0.4. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the focal length f1 of the first lens and the effective focal length EFL of the optical image capturing lens group satisfy the following relationship:- 2.5<f1/EFL<-0.9. For example, the optical image capturing lens group of item 1 or 4 of the scope of patent application, wherein the focal length of the fifth lens is f5, and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship Formula: 0.6<f5/EFL<1.1. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the distance from the image side surface of the fifth lens to the object side surface of the sixth lens on the optical axis is AT56, and the distance between the first lens The distance from the object side to the image side of the sixth lens on the optical axis is Dr1r12, which satisfies the following relationship: 0.09<AT56/Dr1r12<0.3. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the focal length of the fifth lens is f5. The focal length of the six lenses is f6, the refractive index of the first lens is Nd1, the refractive index of the second lens is Nd2, the refractive index of the third lens is Nd3, the refractive index of the fourth lens is Nd4, and the refractive index of the fifth lens is Nd4. The refractive index of the lens is Nd5, and the refractive index of the sixth lens is Nd6, which satisfies the following relationship:

For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the distance from the image side surface of the first lens to the object side surface of the second lens on the optical axis is AT12, and the third lens is at The thickness on the optical axis is CT3, which satisfies the following relationship: 0.3<AT12/CT3<2.4. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the combined focal length of the second lens and the third lens is f23, and the combined focal length of the third lens and the fourth lens is f34 , The combined focal length of the fourth lens and the fifth lens is f45, which satisfies the following relationship: f23>0; f34>0; and f45>0. An imaging device comprising the optical image capturing lens group as claimed in item 1 or item 4 of the scope of patent application, and an image sensor element, wherein the image sensor element is arranged in the imaging of the optical image capturing lens group surface. An electronic device, which includes an imaging device as claimed in the scope of patent application and a near-infrared emitting element, wherein the near-infrared emitting element is used to emit a near-infrared beam, so that the electronic device can operate at two wavelengths of visible light or near-infrared. Segment capture images.

Images